<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
  <title>$Title$</title>

  <script src="${pageContext.request.contextPath}/static/js/jquery-3.6.0.js"></script>

  <script>
    function a(){
      $.post({
          url:"${pageContext.request.contextPath}/a1",
          data:{"name":$("#username").val()},
          success:function (data,status){
              console.log("data="+data);
              console.log("status="+status);

          }
      })
    }

  </script>

</head>
<body>

<%--失去焦点的时候，发送一个请求(携带信息)到后台--%>
用户名：<input type="text" id="username" onblur="a()">

</body>
</html>
